Brand Name: COLMI Model Number: COLMI R12 Certification: ce Certification: FCC Origin: Mainland China High-concerned chemical: None Activity Tracked: Activity Tracker Activity Tracked: Steps Tracker Activity Tracked: Distance Tracker Activity Tracked: Calorie Tracker Waterproof Grade: 5ATM Case Material: STEEL Item Weight: about 3.3g NFC Support: No Metrics measured: Heart Rate Monitor Metrics measured: Sleep Monitor Metrics measured: Blood Oxygen Monitor Metrics measured: Stress Monitor Battery Capacity(mAh): 15mAh (7#~9#), 18mAh(10#~13#) Display screen: Yes Choice: yes